WHY HBM?

HWM (Malaysia) - - LEARN -

Put sim­ply, GDDR5 is fast ap­proach­ing the lim­its of its spec­i­fi­ca­tion. Band­width de­mands con­tinue to grow, and for GDDR5 to keep up, it has had to in­crease its power con­sump­tion ac­cord­ingly. How­ever, each ad­di­tional GB/s of band­width it squeezes out is be­gin­ning to con­sume too much power to be a sus­tain­able or cost-ef­fec­tive op­tion.

HBM ef­fec­tively pro­vides more band­width for less power, al­low­ing GPU man­u­fac­tur­ers to con­tinue to in­crease band­width with­out run­ning into a “power wall”. In hard num­bers, that's over 35GB/s of band­width per watt, com­pared to GDDR5's 10.66GB/s – a 3.5x im­prove­ment.

OC­TO­BER 2015

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HWM

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